Sonar Phidget

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Quick Overview

Detect several solid objects up to 10m away in a wide sensing range, or use this Phidget as an ultrasonic range finder.
Sonar Phidget

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  • Sonar Phidget

Details

For applications of spatial awareness and motion sensing, this handy Sonar Phidget is unmatched. It emits pulses of ultrasonic vibration at a rate of up to 10 pulses per second. After each pulse, it "listens" for ultrasonic waves that have reflected off of objects up to 10m away and sends them to your computer through the VINT Hub via the sensor update event. The Sonar Phidget can detect up to 32 reflections in a single pulse, and will report the approximate distance and strength of each reflected wave.

Useful in Robotics

The Sonar Phidget can be used as an ultrasonic range finder. The distanceChange event automatically returns the distance of the strongest reflection whenever new data comes in. This mode is commonly used for obstacle detection in robotics projects.

Product Specifications

Sensor Properties
Sensor Type Distance (Sonar)
Controlled By VINT
Measurement Distance Min 40 mm
Measurement Distance Max 10 m
Measurement Distance Resolution 10 mm
Sampling Interval Min 100 ms/sample
Sampling Interval Max 60 s/sample
Electrical Properties
Current Consumption Max * 5.6 mA
Current Consumption Min (unconfigured) 47 μA
Physical Properties
Operating Temperature Min -40 °C
Operating Temperature Max 85 °C

* - Current consumption varies depending on the selected data interval and whether or not it is running in "quiet" mode. See the technical section of the User Guide for details.

Documents

Getting Started

Welcome to the DST1200 user guide! In order to get started, make sure you have the following hardware on hand:


Next, you will need to connect the pieces:

DST1200 Functional.jpeg
  1. Connect the DST1200 to the VINT Hub using the Phidget cable.
  2. Connect the VINT Hub to your computer with a USB cable.


Now that you have everything together, let's start using the DST1200!

Using the DST1200

Phidget Control Panel

In order to demonstrate the functionality of the DST1200, the Phidget Control Panel running on a Windows machine will be used.


The Phidget Control Panel is available for use on both macOS and Windows machines. If you would like to follow along, first take a look at the getting started guide for your operating system:


Linux users can follow the getting started with Linux guide and continue reading here for more information about the DST1200.

First Look

After plugging the DST1200 into your computer and opening the Phidget Control Panel, you will see something like this:

DST1200 Panel.jpg


The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:

  • Serial number: allows you to differentiate between similar Phidgets.
  • Channel: allows you to differentiate between similar objects on a Phidget.
  • Version number: corresponds to the firmware version your Phidget is running. If your Phidget is listed in red, your firmware is out of date. Update the firmware by double-clicking the entry.


The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.

Distance Sensor

Double-click on the Distance Sensor , labelled Sonar Phidget, object in order to run the example:

DistanceSensorSonar Example.jpg


General information about the selected object will be displayed at the top of the window. You can also experiment with the following functionality:

  • Modify the change trigger and/or data interval value by dragging the sliders. For more information on these settings, see the data interval/change trigger page.
  • Toggle the Quiet Mode with the checkbox. For more information on Quiet Mode, check out the technical section.
  • The distance (mm) of the strongest reflection will be shown in the Data box. All other reflections (distance and amplitude) can be seen in the Sonar Reflections box. These additional reflections can correspond to other objects, or echoes of the primary object.

Technical Details

Quiet Mode

The DST1200 has a Quiet Mode property which, as the name suggests, reduces the volume of the sound pulses used by the sonar sensors. While the sound that this Phidget makes is audible in either mode, it is much more noticeable without quiet mode enabled. By enabling quiet mode, you will affect the maximum sensing range and the number of reflections detected. Quiet mode also consumes less power, as explained in the next section.

Current Consumption

The current consumption of the DST1200 varies depending on the data interval you choose. The longer the interval between samples, the lower the current consumption. Switching to quiet mode also lowers current consumption slightly.

DST1200-current.jpg

Amplitude Response

When you receive data from the DST1200, you'll end up with an array of sonar reflections that each have a distance and an amplitude. The distance, of course, refers to how far away the object is. The amplitude gives you a general idea of the size of the object. The amplitude value can range from 3 to approximately 900, with 3 being a very small reflection and 900 being a very large one. In most applications, when you're using the DST1200 as an ordinary distance sensor, you'll probably want to ignore all reflections except for the one with the greatest amplitude.

Saturation

The DST1200 will fire saturation error events when the nearest reflection is closer that 40mm from the sensor. At this range it is too close for the sensor to accurately determine the range of the object.

What to do Next

  • Software Overview - Find your preferred programming language here to learn how to write your own code with Phidgets!
  • General Phidget Programming - Read this general guide to the various aspects of programming with Phidgets. Learn how to log data into a spreadsheet, use Phidgets over the network, and much more.
  • Phidget22 API - The API is a universal library of all functions and definitions for programming with Phidgets. Just select your language and device and it'll give you a complete list of all properties, methods, events, and enumerations that are at your disposal.

Additional Information

SKU ES002315
Manufacturer Phidgets

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